Moroccan dairy cuts carbon footprint by recycling liquid waste

Moroccan dairy cuts carbon footprint by recycling liquid waste

A large dairy uses a tailor-made plant solution from EnviroChemie to recycle its liquid waste and efficiently reduce energy consumption and operating costs.

What we did

Generating energy instead of consuming it: the combined treatment of liquid waste and wastewater, which produces biogas, is an attractive alternative to conventional wastewater treatment and disposal for dairies.

  • Objective

    Objective

    A large dairy in Morocco that belongs to an international food company was looking for a sustainable solution to the disposal of liquid waste. Using the slurry in agriculture was not an option. The costs for the disposal of liquid waste and product returns needed to be sustainably reduced to provide planning security for the coming years.

  • Solution

    Solution

    EnviroChemie developed a sustainable plant concept. Instead of disposing of the liquid waste completely, it focused on biogas production. To achieve this,  EnviroChemie designed and installed a Biomar® anaerobic bioreactor, in which methane, i.e. biogas, and carbon dioxide are produced from the liquid waste in the absence of oxygen.

    More than 95% of the COD load of up to 13 t/day is converted into biogas in the bioreactor. In addition to approximately 80 m³ of whey from production, the flotation sludge and sludge from the aerobic wastewater treatment are also fed into the anaerobic reactor. That amounts to about 160 m³ of additional liquid waste with a high energy value. Up to 12 m³ of product returns and expired milk are also recycled daily.

  • Results

    Results

    Anaerobic technology uses less energy than the conventional aerobic process. The reduction in aerobic wastewater treatment means electricity consumption can be reduced by up to 30%.

    The dairy uses the biogas obtained in this way to generate steam to heat and pasteurise the milk, making an oil saving of around 30%.

    The amount of waste to be disposed of, and with it the disposal costs, is also significantly reduced. With the installed plant solution from EnviroChemie, the dairy gains planning reliability and is less affected by any increases in disposal costs.

Reference projects

Energy from wastewater

The Norrmejerier dairies generate energy, conserve resources and reduce operating costs using a Biomar® anaerobic wastewater treatment system.

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The hidden potential in dairies

Dairies use water for many different stages in the production process. There are often potential savings to be made here in terms of resources and energy. To achieve this, however, an integral view is required, since the cycles used in dairies, which have often grown over the years, are highly…

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Treating vapour condensate – reducing water footprint

A multi-national dairy co-operative wanted to treat its vapour condensate sustainably at a German site and thus reduce its fresh water requirements and operating costs.

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Contact

General contact

General contact

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